Water Temp

[Chi100188]

Hey guys just wondering should i be worried around 3 months ago i installed a koyo radiator with stock standard radiator cap the temp on my pfc showed 79-80 degrees when warmed up but 3 months ago i installed a ARC radiator cap and the temp never raises past 65 degrees its even lucky to see 65 degrees so im just wondering should i revert to my standard radiator cap? or just leave it? im not loosing any coolant

Cheers

Chi

[Guilt-Toy]

go back to the old one. the engine should not be running that cold.

[bubba]

My 32 is still in cold start at anything under 65deg.

[mad082]

did it only go up to 65 degrees from the moment you put it on? or has it only just started staying that low? if it has only justed then it will probably be your thermostat. if it started that the moment you put the new cap on the put the old one back on.

[Chi100188]

it all started when i put the new cap on aye so thats prob why im getting crappy fuel eco

[R31Nismoid]

Aftermarket caps on a stock rad are a very bad idea.

The problem is most aftermarket caps have a much higher point of pressure.

This means if you do actually overheat the cap wont pop off when it should, and what will happen is the radiator header tank which is plastic - will simply blow apart and send bits flying everywhere at a very much higher pressure than was ever intended

I remember this happening when i was in Pete's (bass junky) car, and it put a good 2-3 solid dints into the bonnet which is some rather nasty damage and quite costly to fix for just changing a cap.

Since that day i will never change from a factory rated cap (or replacement) on a radiator that is not full alloy.

[Chi100188]

thanks for the reply R31nismoid but the radiator is a KOYO aftermarket one ahh well tonight i put the stock cap back on and max temp was like 65 so im guessing its the thermostat could it be ne thing else? guess its a good time to upgrade to gates radiator hoses + nismo thermostat

[R31Nismoid]

Oh i didn't know if it was a plastic or not - just putting it out there

Sounds like your thermo is stuck - you dont want a Nismo thermo, you want a factory one or you are going to have the same issues.

[Chi100188]

i see no probs thanks for the help lol

[bozodos]

mine sits on 84 at the moment but its leaking coolant via the water pump which will soon be replaced.

I have a fully sick Spac rad cap which has a nipple attached to a hose running down the engine bay and a nifty button to release pressure before opening. Yeah I know you're jealous of it

[Chi100188]

lol hmm where do i get one of those? mmm i quiet like my ARC one does the job

[nismo32gtr]

The r32 gtr i just bought sits on about 79-80 degs just like yours once its warmed up, mine runs a blitz radiator cap and im not to sure but i dont think its the factory radiator is this a good temp it should be running at?

[Chi100188]

79-80 should be the warmed up operating temp so thats good

[nismo32gtr]

79-80 should be the warmed up operating temp so thats good

Ok kool thanks , did you end up finding out why your car was running so cold ?

[Chi100188]

im pretty sure its the thermostat so i ordered another one and also some Mackay radiator hoses to go with it so hsould be all good